Table of Contents
Charging of Insulators
Since charge cannot flow through insulators, neither conduction nor induction can be used to charge, insulators, so in order to charge an insulator friction is used. Whenever an insulator is rubbed against a body exchange of electrons takes place between the two. This results in appearance of equal and opposite charges on the insulator and the other body. Thus the insulator is charged.
For example rubbing of plastic with fur, silk with glass causes charging of these things.
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Reynolds Number
Last modified on:3 years agoReading Time:10MinutesWhat is Reynolds Number? The Reynolds number (Re) is a dimensionless parameter used in fluid mechanics to characterize the flow of a fluid (liquid or gas) around an object or through a conduit. It relates the inertial forces to the viscous forces in the fluid and helps determine the type of…
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JEE Main Mock Test Series
Last modified on:5 years agoReading Time:6Minutes Online Test Series for JEE Main-2022 Gurukul’s Online Chapter Wise, Topic Wise and Mock Tests for JEE Main is a very effective test and assessment platform where students experience different type of tests with different level of toughness. It helps students to get comfortable with the actual exam. Click on the…
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Conceptual Questions Based On Current Electricity
Last modified on:3 years agoReading Time:25MinutesConceptual Questions Based on Current Electricity Here we are providing conceptual questions for Class 12 Physics Chapter 3 Current Electricity. Students are suggested to go through all the questions to understand the chapter well. Q.1. The standard resistance coils are made up of manganin. Why?Answer: When current flows through a wire…
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Conceptual Questions Based On Electric Potential
Last modified on:5 years agoReading Time:10MinutesQ.1. Why earth is considered to be at zero potential?Answer: Earth has very large size. Potential of earth does not change with small charge therefore it is considered as reference level and potential taken as zero. Q.2. If electric potential V within a certain region is constant, what is the nature…
